@mixin badge-variant($bg) {
    color: color-yiq($bg);
    background-color: $bg;

    @at-root a#{&} {
        @include hover-focus() {
            color: color-yiq($bg);
            background-color: darken($bg, 10%);
        }

        &:focus,
        &.focus {
            outline: 0;
            box-shadow: 0 0 0 $badge-focus-width rgba($bg, .5);
        }
    }
}